Not sure if I should be mad or not...

How would you feel if your husband/boyfriend was texting a female friend a lot? It seems innocent enough but I don't know how to feel about it.
Also, he always has his phone with him and if he sets it down by him it's always face down... I'm pregnant and have been having dreams of finding sexts from other girls on his phone a lot (probably bc of this app 😂) but now I am noticing things I didn't pay attention to before. Also, we took a pic today and I wanted him to send it to me and when I typed "s" for the first letter of my contact name this female friends name popped up before mine and I'm 99% sure it does most frequently used contact first... Ugh. Ladies, help me get my emotions/thoughts straight 😞